DDA
Disk Drive Analyzers

Main Features

• 2 GHz Bandwidth

• 16 GS/s Sample Rate

• 64 Mpt Capture Memory

• Ethernet Option

The power to get your job done quickly and easily, and with all the insight you could want. LeCroy Disk Drive Analyzers have performance specifications, capture and analysis features, and a drive-oriented user interface that all provide maximum value to the disk drive engineer.

Drive Analysis

Special front-panel keys provide easy access to a powerful set of drive analysis capabilities.

Analyze your channel from head signal through PRML channel emulation.

Analyze servo wedges and position error signal for insights into positioning errors.

Easy access to a rich set of drive measurements.

View drive-specific graphical analysis such as PRML dot plots, SAM histograms, and media noise analysis measurements.

Performance

• Up to 16 GS/s on a single channel
• Up to 64 Mpts on a single channel
• 2 GHz Bandwidth
• 256 Mbyte processing memory
• 500 MHz external clock input

Drive-Specific Triggers

Only in the DDA series will you find disk drive triggers defined in disk drive terminology.

Customized triggering is available for selecting the n’th servo gate or triggering on every servo gate after the index pulse. The Read Gate Trigger can be customized to select pulses from 100 ns to 50 ms. The PES Trigger will activate signal acquisition when the Position Error Signal exceeds threshold. Finally, the Sector Pulse Trigger allows selection of any particular sector.

The DDM package includes a wide range of basic measurements: TAA, PW50, Overwrite, Resolution, and others. It also offers many local parameters such as local minimum, maximum, time under threshold, and base.

Internal Graphics Printer

A high-resolution internal graphics printer comes standard with the DDA 260. Get hard-copy output in less than 10 seconds, or use the strip chart mode to view all the details in a long, complex signal.

Disk Drive Noise Analysis

Characterize head and media noise. Separate media noise from electronics noise.

PRML Analysis

Channel emulation of PR4, EPR4, E2PR4, and other head signals. You can compute NLTS, ACSN, or view maximum likelihood markers indicating ideal sampling points for a PRML signal.